Jordan Henderson of Liverpool battles for the ball with Patrick van Aanholt of Sunderland during the Barclays Premier League match between Sunderland and Liverpool at Stadium of Light in Sunderland, England.Getty

Jurgen Klopp has expressed concern over Jordan Henderson's health after the midfielder had to be taken off after 61 minutes due to a foot injury. The England international is just back after spending more than two months on the sidelines and Klopp fears that he will be out again because of the injury he picked up against Sunderland.

The Reds have managed to take full points from the two games in the festive period and are currently level on points with Manchester United. However, they have an extremely busy period coming up in January, where they play seven games, two more than their competitors, following their involvement in the semi-finals of the Capital One Cup where they face Stoke City over two legs.

January will also see them play hosts to Arsenal and Manchester United in back-to-back fixtures at Anfield, which could be a defining time in their campaign. Klopp will be hoping that Henderson does not add to their growing injury list, with 10 players currently out of contention for a spot in the starting XI.

"I can't say anything about the problem he has now, but I hope it's not too serious," Klopp said after the game, as quoted by Goal. "I don't really know the situation yet. It's not perfect, otherwise we wouldn't have taken him off, but we had to. Now we have to wait."

Henderson has been suffering from a heel problem which is apparently incurable, but the midfielder has vowed to emerge unscathed and has taken advice from club legend Jamie Carragher who was also affected by the problem.